Finally it works, but with an other way!
Instead to use query and call:
query.send(null);
I can use a Grails tag that permits to call an action via AJAX (with
the Prototype library): here the code (the tag is uses in its function
form):
function initialize() {
${remoteFunction(action: 'data', onSuccess: 'fOnSuccess(e);')}
}
If the AJAX call succeeded, the fOnSuccess JavaScript is called:
function fOnSuccess(e) {
var response = e.responseText.evalJSON();
// TODO : Tester response.status
var dt = new google.visualization.DataTable(response.table,
response.version);
var chart = new google.visualization.PieChart(document.getElementById
('chart_div'));
chart.draw(dt, {width: 400, height: 240, is3D: true});
}
I'm very happy to see how Google visualization can be mixed with
Grails!
I will certainly post a new article on this suject on my web site
http://www.odelia-technologies.com.
Cheers,
Bertrand.
On 18 nov, 10:12, bgoetzmann <[EMAIL PROTECTED]> wrote:
> I do a mistake in my last post! The server part send the string:
>
> myHandler({"version":"0.5","reqId":"1","status":"ok","table":{"cols":
> [... )
>
> And when, in the client part (JavaScript in the Interner browse) calls
> my initialize function with the following code:
>
> var query = new google.visualization.Query('http://localhost:8080/
> grailsbox/visualization/data?responseHandler=myHandler');
> query.send(null);
>
> my myHandler JavaScript function is well called and the graph is well
> displayed on the page!
>
> To repeat the problem I got:
>
> But I remark that a JavaScript error is generated after 30 seconds. I
> understood that it's because I
> use null in the query.send: the API tries to call an handler.
> If I use an handler: query.send(myHandler1); with myHandler1 defined
> like this
>
> function myHandler1(response) {
> if (response.isError()) {
> alert('Error in query: ' + response.getMessage() + ' ' +
> response.getDetailedMessage());
> return;
> }
>
> }
>
> I see an error message telling "Request timed out".
>
> What I missed? The documentation seems to say to use the Query's get
> method, but it is not defined.
>
> Thank you for any help!
>
> Cheers,
>
> Bertrandhttp://www.odelia-technologies.com/
>
> On 17 nov, 18:21, bgoetzmann <[EMAIL PROTECTED]> wrote:
>
>
>
> > Hello,
>
> > I've implemented a custom data source using the powerful Grails
> > framework; here how I use this source in the HTML page:
>
> > ...
> > google.setOnLoadCallback(initialize);
> > function initialize() {
> > var query = new google.visualization.Query('http://localhost:8080/
> > grailsbox/visualization/data?responseHandler=myHandler');
> > query.send(null);}
>
> > function myHandler(response) {
> > // Tester response.status
> > var dt = new google.visualization.DataTable(response.table,
> > response.version);
> > var chart = new google.visualization.PieChart
> > (document.getElementById('chart_div'));
> > chart.draw(dt, {width: 400, height: 240, is3D: true});}
>
> > ...
>
> > The URL is used to fetch JSON data (using a Grails controller action):
>
> > {"version":"0.5","reqId":"1","status":"ok","table":{"cols":[...
>
> > All is OK: the graph is displayed! But I remark that a JavaScript
> > error is generated after 30 seconds. I understood that it's because I
> > use null in the query.send: the API tries to call an handler.
> > If I use an handler: query.send(myHandler1); with myHandler1 defined
> > like this
>
> > function myHandler1(response) {
> > if (response.isError()) {
> > alert('Error in query: ' + response.getMessage() + ' ' +
> > response.getDetailedMessage());
> > return;
> > }
>
> > }
>
> > I see an error message telling "Request timed out".
>
> > What I missed? The documentation seems to say to use the Query's get
> > method, but it is not defined.
>
> > Thank you for any help!
>
> > Cheers,
>
> > Bertrandhttp://www.odelia-technologies.com/- Masquer le texte des messages
> > précédents -
>
> - Afficher le texte des messages précédents -
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